The vertebrate kidney helps to keep the acidity of body fluids constant by varying the amount of hydrogen ions (H+) it secretes into the urine. You can confidently predict that this aspect of kidney function will be controlled by
A) a positive feedback mechanism.
B) a negative feedback mechanism.
C) nerve impulses from the brain.
D) a hormone produced in the kidney itself.
Answer: B
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A bryophyte having a single large hloroplast in each cell belongs to the phylum:a
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Answer the following statement true (T) or false (F)